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14. Let X represent the amount of money a randomly selected SLCC student has in their...
Let X represent the amount of gasoline (gallons) purchased by a randomly selected customer at a...
Let X represent the amount of gasoline (gallons) purchased by a randomly selected customer at a gas station Suppose that the mean value and standard deviation of X are 11.5 and 4.0, respect viely. a. In a sample of 50 randomly selected customers, what is the approximate probability that the sample mean amount purchase is at least 12 gallons? b. In a sample of 50 randomly selected customers, what is the probability that the total amount of gasoline purchase is...
Suppose we had found that the variable giving the amount of grant money raised by the charity in ...
please explain related concept in detail for better
understansing.
Suppose we had found that the variable giving the amount of grant money raised by the charity in the last year follows a right skewed distribution with mean equal to $500,000 and standard deviation equal to $850,000. This is hypothetical. We did not actually measure the variable. We look at the average amount of grant money raised by 40 randomly sampled charities from the charity navigator website. 2. Describe the shape...
let x be the random variable that represent the lenght of time it takes a student...
let x be the random variable that represent the lenght of time it takes a student to complete maths 23 exam. it was found that x has an approximately normal distribution with mean 1.5 hours and standard deviation =025 hours. (a) what is the probability that it takes at least 1.4 hours for a randomly selected student to complete the exam? (b) suppose 25 students are selected at random,what is the probability that the mean time x of completing the...
Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping...
Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping interval. Based on a certain article, the mean of the x distribution is about $14 and the estimated standard deviation is about $9. (a) Consider a random sample of n = 40 customers, each of whom has 10 minutes of unplanned shopping time in a supermarket. From the central limit theorem, what can you say about the probability distribution of the average amount spent...
-/2 POINTS MY NOTES ASK YOUR TEACHER Let x represent the dollar amount spent on supermarket...
-/2 POINTS MY NOTES ASK YOUR TEACHER Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping interval. Based on a certain article, the mean of the x distribution is about $42 and the estimated standard deviation is about $7. (a) Consider a random sample of n = 80 customers, each of whom has 10 minutes of unplanned shopping time in a supermarket. From the central limit theorem, what can you say about the...
Suppose X, the amount of money a student at a university spent on books in 2017,...
Suppose X, the amount of money a student at a university spent on books in 2017, was normally distributed with mean $550 and standard deviation $250 (that is, µ = 550 and σ = 250). Compute the probability that a randomly selected student at this university spent between $520 and $580 on books in 2017 (that is, compute P(520 ≤ X ≤ 580)). (Show work)
The inside diameter of a randomly selected piston ring is a random variable with mean value...
The inside diameter of a randomly selected piston ring is a random variable with mean value 14 cm and standard deviation 0.03 cm (a) If X is the sample mean diameter for a random sample of n 16 rings, where is the sampling distribution of X centered and what is the standard deviation of the X distribution? (Enter your standard deviation to five decimal places.) center standard deviation cm cm (b) Answer the questions posed in part (a) for a...
QUESTION 1 A population has a mean of 60 and a standard deviation of 14. Samples...
QUESTION 1 A population has a mean of 60 and a standard deviation of 14. Samples of size 64 are randomly selected. Calculate the standard deviation of the sample distribution of X. Round off to 3 decimal places.
1. Three randomly selected households are surveyed. The numbers of people in the households are 3, 4 and 11. Assume that samples of size n=2 are randomly selected with replacement from the populatio...
1. Three randomly selected households are surveyed. The numbers of people in the households are 3, 4 and 11. Assume that samples of size n=2 are randomly selected with replacement from the population of3, 4, and 11. Listed below are the nine different samples. Complete parts (a) through (c).3,3 3,4 3,11 4,3 4,4 4,11 11,3 11,4 11,11a. Find the variance of each of the nine samples, then summarize the sampling distribution of the variances in the format of a table...
Suppose the distribution of Y = the amount of time it takes for a randomly selected...
Suppose the distribution of Y = the amount of time it takes for a randomly selected student to complete a particular exam is normal with mean 43.7 minutes and standard deviation 4.6 minutes. Suppose those students who go past a 50 minute time limit are tortured by Dr. Robinson’s singing until they complete the exam. a. Show that the probability of a randomly selected student avoiding any torture is .91459. (6 decimals) b. If 10 students take the exam, what...
Let X represent the amount of gasoline (gallons) purchased by a randomly selected customer at a gas station Suppose that the mean value and standard deviation of X are 11.5 and 4.0, respect viely. a. In a sample of 50 randomly selected customers, what is the approximate probability that the sample mean amount purchase is at least 12 gallons? b. In a sample of 50 randomly selected customers, what is the probability that the total amount of gasoline purchase is...
please explain related concept in detail for better
understansing.
Suppose we had found that the variable giving the amount of grant money raised by the charity in the last year follows a right skewed distribution with mean equal to $500,000 and standard deviation equal to $850,000. This is hypothetical. We did not actually measure the variable. We look at the average amount of grant money raised by 40 randomly sampled charities from the charity navigator website. 2. Describe the shape...
Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping interval. Based on a certain article, the mean of the x distribution is about $14 and the estimated standard deviation is about $9. (a) Consider a random sample of n = 40 customers, each of whom has 10 minutes of unplanned shopping time in a supermarket. From the central limit theorem, what can you say about the probability distribution of the average amount spent...
-/2 POINTS MY NOTES ASK YOUR TEACHER Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping interval. Based on a certain article, the mean of the x distribution is about $42 and the estimated standard deviation is about $7. (a) Consider a random sample of n = 80 customers, each of whom has 10 minutes of unplanned shopping time in a supermarket. From the central limit theorem, what can you say about the...
The inside diameter of a randomly selected piston ring is a random variable with mean value 14 cm and standard deviation 0.03 cm (a) If X is the sample mean diameter for a random sample of n 16 rings, where is the sampling distribution of X centered and what is the standard deviation of the X distribution? (Enter your standard deviation to five decimal places.) center standard deviation cm cm (b) Answer the questions posed in part (a) for a...
QUESTION 1 A population has a mean of 60 and a standard deviation of 14. Samples of size 64 are randomly selected. Calculate the standard deviation of the sample distribution of X. Round off to 3 decimal places.
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